Analysis
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max time kernel
145s -
max time network
124s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
16/04/2024, 07:58
Static task
static1
Behavioral task
behavioral1
Sample
5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
Resource
win11-20240412-en
General
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Target
5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
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Size
797KB
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MD5
e0f4511d749587854a4513380c78c0c1
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SHA1
11b656344f3e81f3574d8addd348430efcbb8a04
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SHA256
5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7
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SHA512
53eea41de3d9788e48a3e5be32b322fb81769488cdebcff206a7f0e2500253977e8a3e1feebe087e8dccad05d279661f28fafae36f7eca92a3b02f2b1ff6e48c
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SSDEEP
24576:nLZZzpVzAyjUykiCbIp7KAhY8SW49NvXJ/aOHK:DDLz1CUwAhLSxNvXJ/9
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/4296-2-0x00000000026F0000-0x000000000280B000-memory.dmp family_djvu behavioral2/memory/1328-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-39-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
pid Process 4784 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3777591257-2471171023-3629228286-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\183fda21-0def-4f14-9099-1a47dd3ecaf8\\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe\" --AutoStart" 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 1 api.2ip.ua 2 api.2ip.ua 7 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4296 set thread context of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 3892 set thread context of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 3416 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 3416 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 4296 wrote to memory of 1328 4296 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 81 PID 1328 wrote to memory of 4784 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 83 PID 1328 wrote to memory of 4784 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 83 PID 1328 wrote to memory of 4784 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 83 PID 1328 wrote to memory of 3892 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 84 PID 1328 wrote to memory of 3892 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 84 PID 1328 wrote to memory of 3892 1328 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 84 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87 PID 3892 wrote to memory of 3416 3892 5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4296 -
C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1328 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\183fda21-0def-4f14-9099-1a47dd3ecaf8" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4784
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C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3892 -
C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe"C:\Users\Admin\AppData\Local\Temp\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3416
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD577fff4010e48018b867bb350fb78b7c2
SHA131b0dfcc0b92a789cd5c94dbf8d0f5aca820ed31
SHA2563e95094f49fea7951fb5ea5551a8b344c1ec16ddaf4f5da7b6bfe1151afa9ee5
SHA51278a8fc7de1b3cbbc2225790bf55fd64b3c7fa922b4601dcbb1103cc12491da71ebae1eebfaa3a2ce2e0b3b3a7b7229dd448012c23a707f84aae8fe0e996c7e89
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD504c844fa1f8c1e9f829d7ee78f552322
SHA1dd938b410fa51321f9de7a50d606b2462982b1f2
SHA2560497e079205722dd2345d0526cf1baaafe5fff4f991ca744048318322b59882d
SHA51299d61c54f0cef83af6da590c81f80dd14094747ae50e15fef010059b1d8dd3061ee5742720965ac8e9a7035a539d87e81be31ce624fbe787a091e02e27dfa4fe
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD556f457fcd8ffe1d0dc8d0336b8ef2a9f
SHA171ea5457df3e4054599b0662a4917fee2bd5fa12
SHA256185a5b7063901cc2c1be12c7bfd255eb7bd535b1fc4d6b01edb87ed1a9454c0c
SHA5128ee87e1ba32fcfc873df1d4588ebd63a8a0283e31b7e63f43e62e1718bbc5f13383b33ef42f5afcb00c35fc345cee9bd192b3b70e70f27395c9b49e4ce15ed10
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C:\Users\Admin\AppData\Local\183fda21-0def-4f14-9099-1a47dd3ecaf8\5879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7.exe
Filesize797KB
MD5e0f4511d749587854a4513380c78c0c1
SHA111b656344f3e81f3574d8addd348430efcbb8a04
SHA2565879a75784ceca8c6c8e9fad40d6a2f5ea6c7e265ee09b7763388ff1225cb4b7
SHA51253eea41de3d9788e48a3e5be32b322fb81769488cdebcff206a7f0e2500253977e8a3e1feebe087e8dccad05d279661f28fafae36f7eca92a3b02f2b1ff6e48c